diff options
Diffstat (limited to 'Core/UefiCpuPkg/SecCore/SecMain.c')
| -rw-r--r-- | Core/UefiCpuPkg/SecCore/SecMain.c | 295 |
1 files changed, 295 insertions, 0 deletions
diff --git a/Core/UefiCpuPkg/SecCore/SecMain.c b/Core/UefiCpuPkg/SecCore/SecMain.c new file mode 100644 index 0000000000..ec252cf719 --- /dev/null +++ b/Core/UefiCpuPkg/SecCore/SecMain.c @@ -0,0 +1,295 @@ +/** @file
+ C functions in SEC
+
+ Copyright (c) 2008 - 2015, Intel Corporation. All rights reserved.<BR>
+ This program and the accompanying materials
+ are licensed and made available under the terms and conditions of the BSD License
+ which accompanies this distribution. The full text of the license may be found at
+ http://opensource.org/licenses/bsd-license.php
+
+ THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
+ WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
+
+**/
+
+#include "SecMain.h"
+
+EFI_PEI_TEMPORARY_RAM_DONE_PPI gSecTemporaryRamDonePpi = {
+ SecTemporaryRamDone
+};
+
+EFI_SEC_PLATFORM_INFORMATION_PPI mSecPlatformInformationPpi = { SecPlatformInformation };
+
+EFI_PEI_PPI_DESCRIPTOR mPeiSecPlatformInformationPpi[] = {
+ {
+ EFI_PEI_PPI_DESCRIPTOR_PPI,
+ &gEfiTemporaryRamDonePpiGuid,
+ &gSecTemporaryRamDonePpi
+ },
+ {
+ (EFI_PEI_PPI_DESCRIPTOR_PPI | EFI_PEI_PPI_DESCRIPTOR_TERMINATE_LIST),
+ &gEfiSecPlatformInformationPpiGuid,
+ &mSecPlatformInformationPpi
+ }
+};
+
+//
+// These are IDT entries pointing to 10:FFFFFFE4h.
+//
+UINT64 mIdtEntryTemplate = 0xffff8e000010ffe4ULL;
+
+/**
+ Caller provided function to be invoked at the end of InitializeDebugAgent().
+
+ Entry point to the C language phase of SEC. After the SEC assembly
+ code has initialized some temporary memory and set up the stack,
+ the control is transferred to this function.
+
+ @param[in] Context The first input parameter of InitializeDebugAgent().
+
+**/
+VOID
+EFIAPI
+SecStartupPhase2(
+ IN VOID *Context
+ );
+
+/**
+
+ Entry point to the C language phase of SEC. After the SEC assembly
+ code has initialized some temporary memory and set up the stack,
+ the control is transferred to this function.
+
+
+ @param SizeOfRam Size of the temporary memory available for use.
+ @param TempRamBase Base address of temporary ram
+ @param BootFirmwareVolume Base address of the Boot Firmware Volume.
+**/
+VOID
+EFIAPI
+SecStartup (
+ IN UINT32 SizeOfRam,
+ IN UINT32 TempRamBase,
+ IN VOID *BootFirmwareVolume
+ )
+{
+ EFI_SEC_PEI_HAND_OFF SecCoreData;
+ IA32_DESCRIPTOR IdtDescriptor;
+ SEC_IDT_TABLE IdtTableInStack;
+ UINT32 Index;
+ UINT32 PeiStackSize;
+ EFI_STATUS Status;
+
+ //
+ // Report Status Code to indicate entering SEC core
+ //
+ REPORT_STATUS_CODE (
+ EFI_PROGRESS_CODE,
+ EFI_SOFTWARE_SEC | EFI_SW_SEC_PC_ENTRY_POINT
+ );
+
+ PeiStackSize = PcdGet32 (PcdPeiTemporaryRamStackSize);
+ if (PeiStackSize == 0) {
+ PeiStackSize = (SizeOfRam >> 1);
+ }
+
+ ASSERT (PeiStackSize < SizeOfRam);
+
+ //
+ // Process all libraries constructor function linked to SecCore.
+ //
+ ProcessLibraryConstructorList ();
+
+ //
+ // Initialize floating point operating environment
+ // to be compliant with UEFI spec.
+ //
+ InitializeFloatingPointUnits ();
+
+ // |-------------------|---->
+ // |IDT Table |
+ // |-------------------|
+ // |PeiService Pointer | PeiStackSize
+ // |-------------------|
+ // | |
+ // | Stack |
+ // |-------------------|---->
+ // | |
+ // | |
+ // | Heap | PeiTemporayRamSize
+ // | |
+ // | |
+ // |-------------------|----> TempRamBase
+
+ IdtTableInStack.PeiService = 0;
+ for (Index = 0; Index < SEC_IDT_ENTRY_COUNT; Index ++) {
+ CopyMem ((VOID*)&IdtTableInStack.IdtTable[Index], (VOID*)&mIdtEntryTemplate, sizeof (UINT64));
+ }
+
+ IdtDescriptor.Base = (UINTN) &IdtTableInStack.IdtTable;
+ IdtDescriptor.Limit = (UINT16)(sizeof (IdtTableInStack.IdtTable) - 1);
+
+ AsmWriteIdtr (&IdtDescriptor);
+
+ //
+ // Setup the default exception handlers
+ //
+ Status = InitializeCpuExceptionHandlers (NULL);
+ ASSERT_EFI_ERROR (Status);
+
+ //
+ // Update the base address and length of Pei temporary memory
+ //
+ SecCoreData.DataSize = (UINT16) sizeof (EFI_SEC_PEI_HAND_OFF);
+ SecCoreData.BootFirmwareVolumeBase = BootFirmwareVolume;
+ SecCoreData.BootFirmwareVolumeSize = (UINTN)(0x100000000ULL - (UINTN) BootFirmwareVolume);
+ SecCoreData.TemporaryRamBase = (VOID*)(UINTN) TempRamBase;
+ SecCoreData.TemporaryRamSize = SizeOfRam;
+ SecCoreData.PeiTemporaryRamBase = SecCoreData.TemporaryRamBase;
+ SecCoreData.PeiTemporaryRamSize = SizeOfRam - PeiStackSize;
+ SecCoreData.StackBase = (VOID*)(UINTN)(TempRamBase + SecCoreData.PeiTemporaryRamSize);
+ SecCoreData.StackSize = PeiStackSize;
+
+ //
+ // Initialize Debug Agent to support source level debug in SEC/PEI phases before memory ready.
+ //
+ InitializeDebugAgent (DEBUG_AGENT_INIT_PREMEM_SEC, &SecCoreData, SecStartupPhase2);
+}
+
+/**
+ Caller provided function to be invoked at the end of InitializeDebugAgent().
+
+ Entry point to the C language phase of SEC. After the SEC assembly
+ code has initialized some temporary memory and set up the stack,
+ the control is transferred to this function.
+
+ @param[in] Context The first input parameter of InitializeDebugAgent().
+
+**/
+VOID
+EFIAPI
+SecStartupPhase2(
+ IN VOID *Context
+ )
+{
+ EFI_SEC_PEI_HAND_OFF *SecCoreData;
+ EFI_PEI_PPI_DESCRIPTOR *PpiList;
+ UINT32 Index;
+ EFI_PEI_PPI_DESCRIPTOR *AllSecPpiList;
+ EFI_PEI_CORE_ENTRY_POINT PeiCoreEntryPoint;
+
+ SecCoreData = (EFI_SEC_PEI_HAND_OFF *) Context;
+ AllSecPpiList = (EFI_PEI_PPI_DESCRIPTOR *) SecCoreData->PeiTemporaryRamBase;
+ //
+ // Find Pei Core entry point. It will report SEC and Pei Core debug information if remote debug
+ // is enabled.
+ //
+ FindAndReportEntryPoints ((EFI_FIRMWARE_VOLUME_HEADER *) SecCoreData->BootFirmwareVolumeBase, &PeiCoreEntryPoint);
+ if (PeiCoreEntryPoint == NULL)
+ {
+ CpuDeadLoop ();
+ }
+
+ //
+ // Perform platform specific initialization before entering PeiCore.
+ //
+ PpiList = SecPlatformMain (SecCoreData);
+ if (PpiList != NULL) {
+ //
+ // Remove the terminal flag from the terminal PPI
+ //
+ CopyMem (AllSecPpiList, mPeiSecPlatformInformationPpi, sizeof (mPeiSecPlatformInformationPpi));
+ Index = sizeof (mPeiSecPlatformInformationPpi) / sizeof (EFI_PEI_PPI_DESCRIPTOR) - 1;
+ AllSecPpiList[Index].Flags = AllSecPpiList[Index].Flags & (~EFI_PEI_PPI_DESCRIPTOR_TERMINATE_LIST);
+
+ //
+ // Append the platform additional PPI list
+ //
+ Index += 1;
+ while (((PpiList->Flags & EFI_PEI_PPI_DESCRIPTOR_TERMINATE_LIST) != EFI_PEI_PPI_DESCRIPTOR_TERMINATE_LIST)) {
+ CopyMem (&AllSecPpiList[Index], PpiList, sizeof (EFI_PEI_PPI_DESCRIPTOR));
+ Index++;
+ PpiList++;
+ }
+
+ //
+ // Add the terminal PPI
+ //
+ CopyMem (&AllSecPpiList[Index ++], PpiList, sizeof (EFI_PEI_PPI_DESCRIPTOR));
+
+ //
+ // Set PpiList to the total PPI
+ //
+ PpiList = AllSecPpiList;
+
+ //
+ // Adjust PEI TEMP RAM Range.
+ //
+ ASSERT (SecCoreData->PeiTemporaryRamSize > Index * sizeof (EFI_PEI_PPI_DESCRIPTOR));
+ SecCoreData->PeiTemporaryRamBase = (VOID *)((UINTN) SecCoreData->PeiTemporaryRamBase + Index * sizeof (EFI_PEI_PPI_DESCRIPTOR));
+ SecCoreData->PeiTemporaryRamSize = SecCoreData->PeiTemporaryRamSize - Index * sizeof (EFI_PEI_PPI_DESCRIPTOR);
+ } else {
+ //
+ // No addition PPI, PpiList directly point to the common PPI list.
+ //
+ PpiList = &mPeiSecPlatformInformationPpi[0];
+ }
+
+ //
+ // Report Status Code to indicate transferring to PEI core
+ //
+ REPORT_STATUS_CODE (
+ EFI_PROGRESS_CODE,
+ EFI_SOFTWARE_SEC | EFI_SW_SEC_PC_HANDOFF_TO_NEXT
+ );
+
+ //
+ // Transfer the control to the PEI core
+ //
+ ASSERT (PeiCoreEntryPoint != NULL);
+ (*PeiCoreEntryPoint) (SecCoreData, PpiList);
+
+ //
+ // Should not come here.
+ //
+ return;
+}
+
+/**
+ TemporaryRamDone() disables the use of Temporary RAM. If present, this service is invoked
+ by the PEI Foundation after the EFI_PEI_PERMANANT_MEMORY_INSTALLED_PPI is installed.
+
+ @retval EFI_SUCCESS Use of Temporary RAM was disabled.
+ @retval EFI_INVALID_PARAMETER Temporary RAM could not be disabled.
+
+**/
+EFI_STATUS
+EFIAPI
+SecTemporaryRamDone (
+ VOID
+ )
+{
+ BOOLEAN State;
+
+ //
+ // Migrate DebugAgentContext.
+ //
+ InitializeDebugAgent (DEBUG_AGENT_INIT_POSTMEM_SEC, NULL, NULL);
+
+ //
+ // Disable interrupts and save current interrupt state
+ //
+ State = SaveAndDisableInterrupts();
+
+ //
+ // Disable Temporary RAM after Stack and Heap have been migrated at this point.
+ //
+ SecPlatformDisableTemporaryMemory ();
+
+ //
+ // Restore original interrupt state
+ //
+ SetInterruptState (State);
+
+ return EFI_SUCCESS;
+}
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